Combined typewriting and computing machine



6 Sheets-Sheet 1 HMVEINTORl A Feb. 19 1924.

A.,w. sTElGER COMBINED TYPEWRTING AND COMPUTING MACHINE AFnedinw. so.

Feb. 19 1924.

A. W. STEIGER COMBINED TYPEWRITING AND COMPUTING MACHINE Filed NOV. 30 1920 6 Sheets-Sheet 2 l INVENTORz LM lEw A'FT RNEY.

' Fehn g A. W. STElGER COMBINED TYPEWHITING AND COMPUTING MACHINE e sheets-sheet Filed Nov. 30,. 1920 I" INVENTOR- ATTOR Y.

Feb. 19 1924.

A. w. sTEiGER GOMBIND TYPEWRITING' AND COMPUTING MACHINE Filed NOV- 30 1920 6 Sheets-Sheet 4 man lNVENTOR:

" lll-1 In ATTO Figi R E m E T S w A.

Feb. 19 1924.

COMBINED TYPEWRITING AND COMPUTING MACHINE Filed Nov. 30 1920 6 Sheets-Sheet 5 Feb. 19 1924 A. w. s'rExqER COMBINED TYPEWRITING AND COMPUTING MACHINE Filed Nov. 30 1920` 6 Sheets-Sheet 6 INVENTOR BY @M Patented Feb. 19, 1921.

UNITED STATES PATENT OFFICE.

ANDREW W.' STEIGER. OF HARTFORD, CONNECTICUT. ASSIGNOR TO UNDERWOOD COM- PUTING MACHINE CQMPANY, 0F NEW YORK, N. Y., A CORPORATION 0F NEW YORK.

COMBINED TYPEWBITING AND coMU'rING MCHINE.

Applleetion med November 30, 1920. Serial No. 427,289.

" To all Hmm it may concern Bc it 'known that I, Annanw W. Sri-nona, a citizen of the United States. residing in llart ford, in the county of Hartford land l*tate of Connecticut. have invented certain new and useful Improvements in Combined Typewriting and Computing Machines, of which 'the following-is a. specification.

This invention relates to computing mechanism. 'and more particularly to improvements in com utijng mechanism set,- tulile either for addition or subtraction.

The machine.I in connection with which these improvements are shown, isy of the l'nderwood-ilunson type. in which. when -set for addition. the number to be computed is first set up in u nest of index pins digit b v digit. and subsequently run up on the computing or dial wheels-of the corresponding register bv means of :i general operator. Although. as' herein disclosed. two registers :ire provided. :i larger number ofregisters ma)` be used.

i'suully in a nuiehine of this type when the sinne is set for subtraction` the pins set up :ire the complements of those which would be set up for addition. and actuation of the general operator runs up udditively on said compu! ing wheels the complement 0f the number to be computed, and thus effects subtraction bjv the complementary subtraction method.

` ln the embodiment of the invention herein disclosed. thc number to he subtracted is indexed on identically the same pins ns -for addition. hut provision is made whereby upon operation of thegeneral operator the pins indexed will have idle movements corresponding to their values. such idle movements will he followed b v active movements corresponding to 'the complements of the pins indexed. and complementary subtraction will thus be effected.

Another feature of the invention involves :i device for resetting the computing mechanis-in for addition after the number has been indexed with thc"mechanism set fol' subtraction. it will be Seen that actuation of the general operator. following such resetting. will run up additively in the corresponding register the number indexed. In case the machine is provided with a number of registers. a resetting device of this kind is used in connection with the actuating means for each re ister.

Provision is also mate of means for resetting all of the index -pins to normal position regardless of the number of registers used. This is in addition to error-key-controlled mechanism whereby ll ofthe index pins as :iated with any one register may be reset to normal position entirely independently of those associated with any other register.

t )ther features and advantages will hereinafter appear.

In the accompanying drawings,

lt`i`gure l is a part-sectional side elevation of a combined typewriting and computing machine of the Underwood-Hanson type, showing the present improvements applied thereto.

Figurf 2 is a plan ofthe computing mechanism with parts omitted.

Figure Sis a skeleton perspective view, showing the essential parts `of the subtractio|i-st`tting device with its parts in ineffective position.

Figure 4 is a fri'igmentary rear elevation, par'ly in section. of the linkage for setting the special pins and `releasing the latches, said linkage being in inoperative position.

Figure 5 is n veiw of the linkage, shown in Figure 4. 'with the parts in an intermedi- :deposition immediately after the tripping ot' the Subtmotion-setting device.

Figure (i is a view of the parts at the right of Figure showing their positions after completion of the subtracting-setting operation,

Figure i' is a View of t-he parts shown in Figure 6. but showing the change in their positions due to the actat-ion of a pin-setting linkage. f

Figure 8 is a side view of the pin-restoring devices. showing the parts in normal position.'`

Figure 9 is a view similar to Figure 8, but

showing the position of the parts after actuation of the handle of the universal pin restoring device.

Figure l0 is a view similar to Figure 8. but showing the parts in the process of being reset by the general operator.

Figure 11 is o side elevation of a register bnr and its associated pin-cage with co-opex xitingszirts in section,showiug the special pln in epressedposition and showingone of the other pins with itssetting just completed and the corresponding latch'just released. A

Figure 12 .is a view similar to Figure 11, but with the movement un ator. i

Figure 13 is a view similar to Figure 11, but with the register bar driven orwardto the end of its stroke by'the general operator.

Alphabet keys 1 and numeral keys 2 serve to actuate key levers 3, which, through bellcranks 4, swing ty -bars 'against the front of a laten 6 rota bly mounted on carriage 'g'. aidr carriage has a step-by-step movenient under control of an escapement mecher control of the general operanism, indicated in general at 8, which is released'at each actuation of an alphabet or a numeral key.`l In said escapementmechanism, a rack bar 9 carried by arms 10, pivoted on carriage 7, meshes with a pinion 11 having a. usual one-way driving connection with escapement wheel 12, which is controlled by the usual dogs 13. The movement of dogs 13 is effected through. connections with universal frame 14: which is actuated at the end of the stroke of any of the typebars by a'heel 15 carried thereby. Y

In the present invention, as is usual in machines of this type, a preliminary setting up of the numbers to be-computed is effected. To this end, a bar 1 6 is pivotally sus vnded from each of key levers 3, correspongiengto `the di its 1 to 9,l inclusive, and co-o ates with an arm 17 mounted on a rocI iaft 18. Arms 19 carried on rock shafts 18 lengaie pins on links 20 and thereby actuate in ages in each of which the upper member, one of said links 20, is pivotally connected with two bell-cranks 21 which are also pivotally connected with a-pn-depre'ssingbar 22. The mechanism, so far described, is

substantially the same as that disclosed in the patent to Hanson, No. 1,278,812, dated Se amber 1o, 1918.

aid linka-ges, when actuated by depression of the numeral keys, serve to depress or set (pins. 23, corresponding to the keys depresse on selected register bars 24 of the proper denomination. The manner in which the pins are supported by the register bars will hereinafter be described.

Pins 23 are normallylocated out of alignment with depressing bars 22 and, in order to enable the setting of pins on register bars of the desired denominations, mechanism must be provided for effecting the select-ion o f such register bals. To this end, the carrlagc 7 is provided with -denomination-select ing dogs 25, mounted for pivotal and sliding movement on rod 26 and normally held hvv rack 27 against movement longitudinal with respect to rod 26.

in-cage at the end of its idle Upon entering n computing zone, n tappct 28 on'a selecting-dog 25 engagigesV in turn jacks 29, pivotally supported at 30 in a hood 31. .These jacks, acting through links 32, levers 33 pivoted at 34, trans sition ,linkages 35, bell-cranks 36, and pms 37 on the register bars, cause the corresponding regis'- ter bars to be advanced a ainst the action of the usual'springs 24' to ring their pins 243 into register or alignment with hars 22. This structure is substantially the same as that disclosed in the patent to Minton, 1,280,- 065, dated September 24, 1.918.

In the embodiment of the invention heroin disclosed, provision is made of two registers,

having in common a single set of pin-setting linkages but having separate denomination; selecting means.

The usual dial wheels, comprised in cach register, have associated therewith thc usual one-way driving means, including pinions 38 meshing with Vracks 40 on register hars 24. Provision is also made of the usual carryover devices mounted on shafts 41 and 42, of which shaft 42 is actuated in the usual munner through vpinions 43 and 44 from rack 45 ou the general operator 4,6. This mechanism is substantially the same as that shown und described in said 1,278,812. y, A

The-general operator is provided with the usual cross-bar 47 through which-smorclncnt of [he register baj's is effected. Normal act-uation'of thc general` operator is obtained in the usual manner by means of operating shaft 48'carryng--a handle shown in dotted lines, gear segments 49, pinions50, and racks 45 on said general operator.

The present invention provides` complomentary subtraction mechanism in which thc numeral keys effect depression for subtract ion of the same pinsas for addition. To this end (pins 23 are supported for the usual raise or depressed adjustment in pin-cages or frames 51 slidably mounted on registi-.r bars 24 by means of portions of said cages 'passing through slots 52 in said bals 24. The pin-cages 51 may also bc referred. to as pincarriers. Normally cach `cage 5l is hcld iu fixed position on its register har hy moans of.

a latching device comprising a hook 53 mounted on the register bar and a latch proper 58 onthe pin-cage: Hook 53 is pivotally supported at 54 on har 24 and carries a p'in 55 engaging in Va slot 56 nbar 24, and consequently 'limiting the movement of hook .53 which is pressed u wardly by spring 57. Latch 58 has a hook end normally engaging hook 53 and is pivot-ally supported al 59 in such a manner as to bc held in either latching or released position. The end of latch 5B opposite the hook is provided wilh a heel 60 to be engaged4 by a linkag(` to bc ,hereinafter described, which. at the tina` of subtraction setting, acts to depress special spending latch to on all of the register bars. The forward end of each latch 58 over-lies a shoulder on the subtraction pin 23 associated therewith, to theend that restoration of a pin 23 will eliect movement ofthe correetfective osition in case it had been moved to ine ective position.

It will be seen that in performing addition, the general operator engages the index pins which have been set, and that performing subtraction. the general operator engages the special pins. Furthermore, in

performing Subtraction, theV pin-cages, withv thc exception of thatl on the units bar, must in cach-case be advanced to the same extent; as would be'obtained with all of the 9 pins deprcsser. Preferably, bar 47 of the general operator is slotted to provide, 1n connection with each computing unit, a surface 47 for engaging the depressed pins 1n performing addition and a surface 47 for engaging the Special pins 23 in performmg subtraction. The distance between said Asurfaces 47 and 47 is the same as that between the 9 pins and the special pins 23'.

Obviously two separate bars may be used in place of the slotted bar and .said bars may be operated together or independently.4 It will` be seen that the pin-carriers 51 with their index pins 23, their subtraction pins 23 and their hooks or latches 58 constitute interponent devices to transmit the motion of the general operator 46 to the register bars in accordance with the Settings of said pins and lat-ches.

The latch-engaging linkage, just referred toincludsa lowerbar 61 carryingr on raised arms near its ends pins 6l which engage in slots 62 in bell-cranks 63. Said hellazranks are caused to more in unison by means of a bar 64 pivotally connected to said bell-cranks at their upper ortions. Suitable guiding means are provided for ha r 61. At the left side of the machine one of said bell-cranks 63 forms part of a bail 64 mounted on shaft 65. Said bail, while normally held withdrawn from the pin-setting linkages. as will be pointed out later, is. at times, allowed to moveabout shaft 65 into a position such that it will be engaged and rocked by any of said pin-setting link--` ages actuated hy a numeral key. Bar 61 is urged toward the left of the machine and upwardly by a spring 65* connecting the upright arm at that end of bar 61 with' an arm 66 secured to a iixed part of the frame.

Normally the latch-engaging linkage` which by its osition, determines whether addition or subtraction is to be perfornud. is held in the position shown in Figure 4. with its lower har in raised position and with the bail 64 out of position to be engazed by the usual pin-setting linkages.

ToA 'control said latch-engaging linkage, provision is Iliade of a shaft 67 carrying,r a

' bar.

lever G8 with its forward end Gt) substantiall),1 parallel to Said shaft 6T. Pirotally connected at 7() with said forward end 6*.) is a latch member 7l provided with a shoulder 72 which normally engages pin 611. Member 71 is urged toward the right of the machine by a springr 73. The forward end of lever (i8 is urged downwardl) by a spring 74 connect-innr said forward end with an arm 75 on a rock shaft T6 extending across the machine. Lever (i8 is. liowever, normally restrained from increment in response to the urging of spring 74 by engagement of a pin 7? on the rear arm thereof with a shoulder 78 on arm 75.

With level' 68 in this posit-ion. the parts will be maintained in the positions shown in Figure 4. Upon rockingr shaft 76 hy means of link 79` connected at one end with arm 75 and at the other with subtraction key 80, or hy means of thc automatic subtraction settingr means shown in Figure 3, and which will hereinafter be described. lever 68 will be released. Upon such releasc,the parts `will assume 'the positions shown in Figure 5 and at the same time Set all` of the special pins Q3. Shoulder 2 on latch 71 will slip past pin Gl and the parts will then assume the positions shown in Figure 6 with hail (l-ly in position to be engaged by bell-cranks Q1 of the pin-setting linkages.

Noure if a register har is advanced by the' denominationalSelecting means to bring: the pins into alignment with the corresponding linkages and a numeral key is depressed, not only Vwill the pin corresponding to the numeral key be depressed. hut hail (54 will hc actuated and consequently liar 6l depressed to release the latch on the selected register This condition is shown in Figure l1. Upon actuation of the general operator. har 47 thereof will engage the depressed pin 23 andmove the pin-cage 51 until tht` pin correspondingr to the numeral key depressed engages stop member or lug 8l and moves the register bar to turn the dial wheel. It will bc seen that the idle movement of thc pin-cage corresponds to the pin set up and that the driving! or active movement corresponds to the complement ofthe pin set.

As is usual in machines arranged for complementary subtraction. it is necessary to provide means to ,frire the units dial wheel an additional step. To this end. a bar Si' is pivotally connected to the units pin-cage 51 at 83 in such a manner that it willhe held in raised or lowered position as set. Swinging movement of har R2 with reforcnce to the units register har is limited hy' a pin 84 on the pin-cage projecting: into a slot 85 a't the rear end of said har 82.

Bar 82 is also provided with an upwardlycxtending: lug 86 in position to he engaged h r har 6l upon subtraction setting.- Stich artuate hail G4 depressing the Aol' lever 0H will restore .6H will cause the engagement will cause depression of the near i cnt 'of bar 82, so that s oulder 87 thereon will beA engaged by surface 47 of bar '47 upon actuation of: the general operator. It will be understood that shoulder 87.s posi tioncd to the rear of tlie' pin -23 of the units register bar a distance sltlicient to give the necessary added increment to the units register har and conse uently to the units register wheel or dia wheeLv Evidently, in view of the use of bar'82, the subtraction or special pin 23* on raged by the general operator and has no driving function. This pin is, however, necessary to restore the .latch on the units pinicagc to effective position.

It is -also desirable to'note thc eect of 9 key during the opera.- tion of subtraction. All of the special pins 23 are depressed at the time of subtraction setting. so depressionof tlie 9 linkage and the 9 pin on the pin-age of the selected bar will not change the extent. of movement of said pin-cage by the general operator. Aetnation of the 9 linkage will, however. and consequently through har (il cause the release of the pm-cage on the selected register bar.

Upon return of the, lgeneral -operator to normal positiolu har 47'- will engage the. usual lugs nea'r the rear ends of register bars 24 and restore the same to thc control of springs 24.' i

Provision is also made for restoring thc parts to normal position. that is.` with the machine set for addition, upon operative movement. of the general operator. For this purpose. a hell-crank 88 is mounted on a pin 8f) substantially in alignment with shaft T0. ;.\t its lower end` hell-crank 88 is provided withA a roll 90 normally resting: in a recess 01 of the adjacent side bar of the general operator. and. at 'the end of the upright arm. lwith a pin 92 overlying: the rearwatally-extending arm of thc lever 68.

lt is evident that forward movement of the general operator will cause roll 90 to rise out of recess 91 and ride on the to of the side har. The upper arm of saidlicllerank will at the same time he thrown to the rear and h v engagement of pin 02 with lthe curved upper surface on thc rear end said lever to its no1-- mal position. and thereby permit sprint7 74 to draw arm T5 forward to position shoulder TR' over pin 77. The corresponding.r npward movement of the forward end of lever parts to he restored to the position shown in Figure 4. In this upward morena-nt. member 71 is permitted to .slip past pin 0l h v virtue of its pivotal support at T0 and viclrlintr support ln' spring;r T3. During its rearward or return movement. the general operator. through mechanism to he described hereinafter.

the units bar is not enagainstmovementhy latch 100.

causes restoration to Vnormal position of all pins 23 and 23* which had been set, and

restoration 'to effective condition ofall latch members 58-,wl1ich had been moved to ineffective position. Obviously, the' normal setting,r of thc mechanism is for addition, inasmuch as subtraction setting must beeffected before entering a computing zonc and actuation of the general operator immediat-ely resets the mechanism for addition.

As hereinbefore stat of means whereby the subtractiomsetting means may be thrown into action automati` rally. For this purpose, there is provided on the rack 93 carried by carriage 7 asul)` traction stop or tappet 94, which is provided with an extension 95 etendi'ng for s ul'ista'li4- tially a computing zone; and positionedto engage a dog 96 on lever 97 and rock said lever: The `rocking' ot' said lever 97 acts through link 98 and bail 99 to withdraw :r latch 100 from beneath one arm of a bellerank 101 loosely mounted ou the -shaft 76. `'lotlie other arm ofA said bella-.rank are secured a pair of springs 102 and 103 which tend to rockjhell-crank 101. normally held lVlien. however. the latch iS withdrawn. hell-crank 101 will he rocked so that its upright armv will engage aA lug: 104 on an arm 105 secured to shaft 76 and thereby roel: said shaft to set the mechanism for subtraction. The connectionv between hell-erank 101 and arm 105 is such as to permit-[manual operation of shaft. 76. without disturbing hell-crank 101 and the mechanism controlling the same. rovision is Ialso made of'a non-compute key' 100 whieh` when actuated, acts through link 107 and hell-crank 108 to actuate arm 100 on shaft 110 t0 swing rearwardly rolls 112. inountefl on arms lll. thereby lowering rolls 113 and consequently denominationseleeting dogs 25 ont of operative relation with jacks 29. With the denominational control rendered ineffective` it is desirable to prevent automatic subtraction setting. 'l`o this end. provision is made of a pin IH. on link 107. engaging with a lever 11? protrd at V116 and havingr altaehed thereto one end of spring.r 102. Mounted at and eonncetcd with spring 103 is' a plate 117 carryina latch 118 adapted to engage pin 1li) on` hell-crank 101 and lot-k the same against movement under the urging of spriuglrs 102 and 103. 'Control of..plate l'li' h r lever i is ohtained hy means ot a pin iu the latter projectingr into a slot in the former. This control is Such as to permit actuation nf the non-eompute ley eren if latch 11H is blocked hy pin 119. This mecha uism is substantially the same as that shown in the` raid patent to Minton, 1.280.003,

As a eonsequence of the setting for complenn-ulary subtraction of .the same index provision is made pins as for addition, by resetting thespecial pins` and consequently latches 58 after a number has been set up for subtraction, operation of the general operator will cause the number instead of its complement to be run up in the register. Provision ismade, therefore, for resetting the special pins 23, only, after the devices have been set for subtraction. For this purpose, a bail, comprising a pinrestoring bar 120 with arms 121 and 122 integrallyattached thereto, is loosely mountedon shaft 123.

For e'ectin the restoration ofthe pins 23* to norma position independently of pins 23, a lever 124 ispivoted at .-tl'ie front of the machine and connected by a link 125 to one arm of a bell-crank126, the other arm of which underlies arm 121, of said bail. Said bell-crank 126 is loosely mounted on aV shaft 127. The parts are urged away from pin-restoring position by means of a spring 128 coiled about shaft 123'and engagi at its ends arm 121 and link 125. It will be understood that each computing unit is providedwith a device of this kind.

Inasmuch as the depression of the special or subtraction pins 23a causes the same forward movement of the pin-carryin frames by the general operator as woul be obtainedby depressing all of the 9 pins, it.

is evident that complementary subtraction can be effected by a modified structure, in which the special pins 23 are omitted, and the latcliing devices and additional pinsetting linkage are associated with the 9 pins. Without said special pins 23, how' ever,- resetting to run up additively the number, indexed with the mechanism set for subtraction, will not produce the desired result, for all of the pins will be reset,vand, therefore, the-number run up inthe register will differ from the number indexed if the digit 9 appears therein.

In order to use the restorin,Y bar 120, it is necessary to provide the usua pin-restoring platform or plate 129 with a recess of such depth that bar 120 normally resting on the bottom of the recess will have its upper surface in the same plane as the upper surface of plate 129. Obviously, in' the pinrestoring action of act substantially as a part thereof. At lts forward end, said plate 129 is pivotall supported on the substantially horizonta arms of small bell-cranks 130 and 131 secured to the ends of a sleeve 132 loosely mounted o'n shaft 123. Atits other end, plate 129 1s similarly supported on bell-cranks 133 and 134 secured to sleeve 135 loosely mounted on shaft 127. -'I`l1e inrestoring action of plate 129 is effected t rough en arm 136 which engages an arm 137 secured -to thc bottom of plate 129.

Suid arm 136 is actuated by shaft 123 ou which it is fixed, and shaft123 has fixed plate 129,-bar 120 will. h

'action of spring 151 and-latch 150 withthereon at theieIt-nand side of the machine an arm 138 through which it isl operated. At the left side of the machine, the side bar of the general operator is providedwith a cammin dog`139 ivoted at 140 on a bracket 141 fixe to said ar. A. pin 142 limits the pivotal movement of camming dog 139 in one direction and the dog is normally held against said pin uy a sprin 143. Obviously, on the forward movement of the general operator, dog 139 will yield upon engagement with arm 138 and slip past' said arm, but on the return movement, said dog will cam up arm 138` in passing and cause opg eration of the pin-restoring plates of'all computing units.

vProvision is also made for restoring all of the depressed pins in the various units independently of the action the general operator. To this end, an arm 1f-4 of general L-shape is loosely mounted at one'end on shaft 123. A .lug 145'on arm 144 under, lies arm 138 and provides such a connection that arm 138 may be actuated by arm 144 or independently thereof. The downwardly-extending leg of arm 144 is provided at its lower end'witha notched offset por? tion 146 and on its rear side with an up wardlyffacing shoulder' 147. A collar 148 fixed on shaft 127 is provided with a in 149 extendin 4in a substantially rearwar direction an a downwardly-extending latch or pawl 150. A sprin 151 connecting olset 146 to pin 149 ten s to move upwardly the rear end of arm 144 and to rock shaft 127so as to press latch or pawl 150 ,a ainst the downwardlyextending orton o arm 144. When anni 144 is su ciently de resscd, aWl 150 will engage shoulder 14 and loc arm 144 against u ward movement. To effect restoration o arm'144 to normal position, the general operator is provided With a cam member 144? which upon forward movement of said general operator will engage arm 144, as shown in Figure 9, and depress the same suliiciently to restore it to the control of latch 150. At the left of the machine, shaft 127 is provided with an operating arm 152 fixed thereon.

Upon depression of a key 153 at the end of arm 152, shaft 127 will he rocked against the drawn from shoulder 147. Under the t-ension of spring 151, which is of sufficient strength, arm 144 is thrown upwardly and through arm 138 and other connections effects the lifting of pin-restoring plates 129 in the various computing units.

Each computing unit 1s also provided with well-known mechanism in which key 154, when pressed down against the action of restoringr spring 154, tensions spring 155 connected to the forward end of lever 156. At the end of the downward movement 0f key154, a cam portion thereof trips latch member 157. and permits spring 155 to rock lever 156 and thereby cause the pin-restoring latform 129 to be lifted.

Y A l of the pin-restoriri devices herein disclosed have important notions in connection with the present form of computing mechanism, especially in view of the plurality of registers. e pin-restori ng action effected by the general operator is usual in machines o f this ty v The `universal p in-restori mechanism which becomes effective upon e ression, of key 153 is .of particular value when a mistake has been made in indexing the number, Followin the action of said universal mechanism an the consequent -resetting of all of tlie pins, the correct number may be indexed and the'computation eti'ected.

As a safeguard to revent im roper actuation of shaft 127, eit er manna ly by means of key 153 or from any other cause, and consequent improper actuation of the universal pin-restoring mechanism during the operation`of the general operator, provision is nade of a locking device for said shaft. Said locking device, shown in Figures 1 and 3, comprises a lever or arm 158 fixed to shaft 127 and having its rear end normally resting on a direction, as viewed in Figure 1. At its forward end, said lever 158 is provided with a horizontal extension 160 which, with said lever 158 in normal position, will permit the assageV immediately thereunder of a shelfiike member 161 attached tothe adjacent rack-bar of the general operator. As will be understood, extension 160 and. member 161 are of such dimension asto effect locking of said-shaft 127 during substantially the whole of the forward and return strokes of the. enel-al operator. Y

Vlgith a plurality of registers, it maylY be desirable to add in some, subtract in ot ers, and to leave the remainder unchanged. To obtain this result, the machine is set for subtraction, either manually or automatically, and the desired number indexed. Operative movement of the general operator at this time would eii'ect subtraction in all i of the registers.' If, however, lever 124 of anycomputng unit is de ressed, bar 120, corresponding thereto, Wil a'ct to restore subtract ion ins 23 to normal positions, and thereby shi t the pivoted latch members'58 to positions to engage hooks 53. Upon operative movement of the eneral operator, the number indexed will ge run up additvely in the corresponding register; Also,

' deression of key 154 of any computing unit cause restoration of index pins 23 and subtraction pins 23*v to normal position, and operative movement of the general operator will be ineffective relative to this computing unit.

fixed cross-bar 159, thus serving tol limit the rotation of shaft 127 in a clockwise i In machines of this' type, each set of index pins comprises nine pins and these are referred by their numbers from front to rear. With mechanism such as disclosed in said Hanson and Minton. patents, depression of the numeral keys when the machine is set for addition. will effect depression of pins having the same numbers as the keys depressed ai'id-.coriesponding to the number printed, but, upon settin for subtraction, the pins de ressed willie those complementaryto t e pins havin the same numV bers as the keys dep then, the number is indexed on the pins, but, for subtraction, the number is not indexed on the pins although a setting thereof is obtained. In the machine herein disclosed, the same index pins are depressed for both addition and subtraction and the number is indexed in both cases. v

Variations may beresorted to within the scope of the invention, and portions of the im rovements may be used without others.

aving thus described my invention, I claim:

l. Iii a computing machine, the combination with'a register, of operating means therefor, including a driving element for said register. numeral keys, indexing devices lindividual to said numeral keys mounted on Said driving element, numeral` key-actuated devices for severally setting said indexing devices, means to bring said indexing devices and their respective setting devices from a normally inoperative into an operative relation with respect to each other, means to operate said driving element to an extent proportional to the value of the indexing device set, and means to modify the action of said operating means, whereby the operation of 4the driving element will be that normally obtained by setting the complementary'indexing device. f

2. ln a computing machine, the combination with a register, includin` register Wheels and pinions, one for eacli register Wheel, havin 'one-way driving connections therewith, o rack-bars meshing with said pinions, sets of index pins mounted in frames carried by said raclcbars, numeral keys, numeralkey-actuated devices for setting pins in accordance with the numeral keys depressed, means, iucliidinga genen-.l operator, for normally driving said rackbars to extents correspondingr to the pins set, and thereby actuating th register wheels, and subtraction mechanis n effective to change the dri-vineY relation between said general operator, said in-carryiiig frames, and said radii-bars, whereby operation of the general !operator will effect ra-ik-blir movements corresponding to pins cimplementary to those set.

3. In a computing. machine, the co bination with computing wheels, of bars for sev- For addition,

llO

erally actuating said wheels, numeral keys,

niimeral-key-operated index devices set in accordance with the numeral keys depressed,

Y meansV to actuate said dexdevices for ac- L, established.

4. -In a computing machine, the. combination with computing wheels, of driving bars therefor having one-way driving connections therewith, a set-'of indexing devices slidably mounted on each of said drivingbars, a. latch associatedl with each set of in dexing devices, and normally e'ective to prevent movement of said set of indexing devices with reference to the corresponding driving bar, means to yset said indexing devices a. general operator for en ging the A devices set, and lthere y movingr the 'driving barslto corresponding extents, subtractionsetting means, and means cf- A -fe'ctive upon subtraction setting to cause release of the latch on each driving bar on which an indexing device is set to index a digit, and to change the driving` relation between the ingbar, so t will have an idle movement corresponding to the number of the indexing device set A followed by an active movement to 'advance the driving bar an amountA corresponding vto th complement-of the indexing device 5. In a. computing machine, the combination` with a register, including register wheel, of bars having,r alone-way driving Aconnection with their .respective register wheels, a pin-carrier having a single set of index pins associated with each of said bai-s. addition mechanism for actuating said pincairiers and consequently said bars4 to run up additively on said register wheels the number indexed on said index pins, and subtraction mechanism including meansfoimodifying the action ofthe addition mechanism for actuating said bars, to run up ou said register wheels a number complementary to 'that indexed on said index pins.

6. In a computing machine, the combination with register wheels, 'of one-way driving means therefor, including bars, one for each 'register wheel, a series of settable in dex pins supported in a frame slidably mounted on each bar and normally locked against movement thereon, an operating` element for engaging any index pin set, and thereby actuating the register bars to run up additively on said re ister wheels the number indexed, and su traction nieclianism, including means for releasing from eneral operator and said driv i'iat the set of indexing devices the corresponding register bar'each pin` supporting frame in which an index pin is set, ,whereby movement of said operatingV element .will cause the number, complementary to that indexed onrthe pins, to be run up in the register.

7. In a computing machine, the combina'- tion with a register, .including register wheels, of combined additionand subtraction mechanism, includingregister bars having actuating connections with each of said register wheels, a series of pins mounted on each register bar. means for indexing on said pins a number to be run up in said register, a general 'operator for actuating said register ,bars and their associated ,register wheels,

means, rendered eli'ective4 upon setting for subtraction; for modifying the driving relation between the general operator and fthe register bars by setting certain pins on all the register hairs. and means operatively connected with said indexing means at such siibtraction'setting, for further modifying thedriving relation between a register har. on which a pin is indexed, and the general operator. so that operation of the. latter will actuiite the former to run up on the corresponding register wheel a. number corresponding tn the pin complementary to that set. y

8. In a computing machine, the coi'nbina tion with a register, including register wheels, of actuating means for said register wheels, comprising a .general operator and means for transmitting motion from said general operator to said register wheels, including a register bar. a frame carrying a set of index pins slidahly mounted on said register har, and bitching means for holding said fijanie against increment relative to -said register bar.

9. In a computing niaithine. thc coinhination with ii register, including indicating elements, of actuating means for said indicating elements, including a register bar. a fraine'cariyiiig a setof index pins sli'ilal'ily mounted on saidi-egisler bar. lait-hing iin-:ins for preventing movi-nient of sind traine ou said bar; a stop on said bnr in position to he engaged by ii depressed pin nn an nutriti-hed frame after an idle inoven'ieni of said iin latched frame corrcspoi'idiiig to the number. of the pin depressed, and means to actnate said trame.

10. In ii computing machine, the combina tion with n register. of register hars having operativo connection therewith; friiii'n-s carrying sets of pins, slidaiily inmin'rcd'nii said register hais. lati-hing devices normally lli) positioned to set4 certain pins on normally actuating said bars, devices, includingr index pins, for determiningr the operative relation between said actuating means and said register liars, linkages for setting said index pins,- and a complementary subtraction device, comprising a linkage including two hell-cranks having slots extending lon itudinally with respect to the horizonte. arms thetvof, a depressing bar having pins engaging in said slots, and a link connecting the upright arms of said bell-cranks to cause them to move together, a bail universal to said index-pin-setting linkages, spring means tending to move the depressing bar into position with its pins at the outer ends of said slots, and a device for normally holding said depressing .bar withA its pins at the inner ends of the slots and at the same time positioning said bell-cranks, so as to hold said bail withdrawn from operative position with respect to said linkages. 12. In a computing machine, the combination with computin wheels and actuating means therefor, inuding actuating bars having settable index pins mounted thereon,

of means to restore to normal position pins spring-pre which have been set comprising a plate supported for parallel movement, means for moving Said plate to restore to normal osition any pins which have been set, late ing means for. preventing operation `of said plate-moving means, a spring for actuating said plate-moving means and holding said latching means in effective osition, and means or renderingfsaid latchig means ineffective.

13. In a computing machine, the combination with means to index numbers including aset of index pins, of a device for restoring indexed pins to normal position, manual] controlled means for normally holding saiddevice in inoperative position, and a spring for operating sid restoring device and retaining said holding means normally in operative position.

14; In a computing machine, the combination with means .to index numbelsincluding settable index pins, of means to restore set pins to unset position com 'rising a member in a direction to cause pintion with settable members, of means for restoring set members to normal position comprising a device movable toward iiieniber7 restoring position, a pivotally-mounted arm havin operative connections with Said movable evioe, a detent for engaging Said pivotally-mounted arm and holding it against operative movement, and a spring connecting said arm with said detent..

16.. In a computing machine, the combination with a register wheel, of actuating means therefor including a bar, a series of settable index pins mounted in a frame slidable with respect to said bar, numeralkey-actuated means for setting said pins, and means for actuating said bar including means for moving said slidable frame a distance corresponding tothe index pin of highest value, and a stop positioned on said bar to be engaged hy an indexed pin after an idle` movement of said slidable fi'aii'ic corresponding to the value of the indexed pin, whereby the bar will be actuated au amount corresponding to the complement of the pin indexed.

17. In a computing machine, the'coinbinat-ion with a register including-'register units, of actuatin members having one-way driving connections with their respective register units, a carrier having a single set of index devices associated with each of said actuating members, addition mechanism for o erating said carriers and cons uently said actuating members to run up a ditively on said register units the numberindexed on said index devices, and subtraction mecha,

nism for modifying the action of the addition mechanism for operating said actuating members to run up on said register units a number complementary to that indexed on Vsaid index devices.

18. In a computing machine, the combination with a register, of driving bars therefor, a set of index devices for each of said driving bars, a supporting frame for each set of index` devices mounted for movement longitudinaliy of the corresponding driving har; latching devices for preventing movement of the supporting frames with respect to the correspondin bars, eans to drive each frame in accor ance wit the index device set, subtraction means including means to release the latching device for each frame in which an index device is set,

a stop positioned on each of said driving lbars in position to be engaged by a set index. device after an idle movement of the corresponding frame proportional to the value of t e index device set, andY means to operate l nation with a register,

complementary subtraction,

bar, latching devices each of said frames anamount corres n ding to the valut f the highest index evice in each set.

19. In a computing machine, the combination with 'a plurality of registers, of means individual to said registers for effecting each of said complementary subtractionV means including indexin devices, means universal to all of said registers for indexing the number to be computed, operating meansto etiect registration of the com utation, and devices individual to the registers to set the computunits for addition after the number has been indexed and prior to the operation of said o rating means.

20.- n s. computing machine for performing complementary substraction, the combio driving bars therefor, a set of indexing devices for each of said drivin bars, a supportin frame for each of sai sets mounted for s iding movement relative to the corresponding driving normally elective for preventing movement of the supporting frames with respect to the corresponding driving bars, a'stop on eachdriving barin nation with a computin `position to be engaged for said frames, connections by a set indexing device after an id e movement of the corresponding frame proportional to the value of the indexing device, means to release the latching device for a frame in which an in` dexing device is set, au operating device between said frames and said operatin device whereby all of said frames will be riven an amount corresponding to the indexing devices of highest value, and means, for settingthe machine for addition after the indexing operation is completed, comprising means to restore to effective condition all latching devices which have been released, und means to change the driving relation between said supporting frames and said operating device, whereby the frames will be actuated in accordance with the indexing device set.

21. In a computing machine, the combiwheel, of actuating means therefor inclu( ing a driving bar, a frame slidably mounted on said driving bar, a device for latching said frame in position on said bar including a latch member pivoted on said frame, a series of settable index pins supported in said frame, a special pin settabl'v supported in said traine and having a. shoulder underlying the forward end of said latch member` a two-part general operator having an edge to engage a depressed index pin when the special pin is in ineffective position, and asecond engaging edge spaced to the rear of said forward edge a. distance equal to that between the index pin of highest value and the special pin for engaging said special pin when operativelv positioned.

22. In a computingmachine, the combination with a register including a. computing unit, of actuating means for said coinputing unit including an'.I actuating member, a series of settable index devices mounted on a movable frame, numeralkeyactuated means for setting said index devices, and actuating-member-operating means, including means for moving said frame a distance correspondn to the index device of highest value, an means for effecting driving connection between said actuating member and said frame after an idle movement of the latterl corresponding to the value of the index device set.

23.`In a. computing machine, the combination with a computing member, of actuating means therefor comprising a reciprocablebar, a frame slidably mounted with res ect to said bar, settable pins carried by sai frame, atching means to hold said frame against movement relative to said bar, said latching means including a member movable t0 and from a position to render said latching means effective, and operative connections betweenone of said pins and said movable member, whereby setting of said pin will not eli'ect an unlatching movement of said movable member, but restoration of said pin to normal position will effect restoration to operative position of said movable member it in an inoperative position.

.24. ln a computing machine, the combination with-a computin member, of means to actuate said computing member including a reciprocable bar, settable pins mounted in a. frame slidably supported relatively to said bar, a pivoted latch member on said frame adjacent the rearinost pin and having a portion overlying the portion of said rearmost pin, permitting depression of said rearmost pin without depression of said latch member, but insuring restoration of the latch member. if in depressed position, upon restoration of the associated pin, and means on said bar for engagement by said pivoted latch member.

l 25. Inv a computing machine, the combination with a set of movable frames, each of said frames carrying a series of scttalile index 4pins and a settable subtraction pin, of means including a movable member for restoring t'o raised position all depressed sul)- Vtraction pins,` means includingr a movable versal to all sets of index devices for indexing thereon the number to be computed, means individual .to each of said actuating devices to set the same for addition after the number has been indexed with the machine set for subtraction, a general operator, and general o rater-actuated means for rc storing al of the index devices to normal position and setting the machine for addition.

2'?. Ima computing machine, the combination vith a plurality. of registers. of mechanism for performing either addition or complementary subtraction comprising an actuating device for cachot saidregisters including a set of index devices, means universal to all sets of index devices for indexing thereon the nu'm'ber to be computed. means individual to each of said actuating devices to set the same for addition after thc number has been indexed 'with thc machine Set for subtraction, and manually controlled means for restoring to normal position all of said index devices which have been set.

28` In a computing machine. the combination with a plurality of registers, of mechanism for performing either addition or complementary subtraction comprising ari actuating device for each of said registers including a set of index devices. means universal to all sets of index devices for indexing thereon the number to' he computed. means individual to each of said actuating devices to set the same for addition after with the mameans indithe number has been indexed chine set for subtraction. and vidual to each set of index devices for restoring' to normal'position all of the actuated index devices of any selected set.

29. In a computing machine. the combination with a plurality of registers. of complementary subtraction mechanism comprising an actuating device for each of said registers including a set of'index devices. means to index on all of said sets of index devices the number to be computed. means individual to each of said actuating devices to set the same' for addition after the number has been indexed. and means individual to cach of said actuating devices to restore to norm'al conditipn the index devices forming a part thereo 30. In a compnting'machine. the combination with a series of leciprucalile llalS. ent'll having a latch member. of a series of frames slidablv mounted thereon. each of said frames having mounted thereon settablc index pins, a settablc special pin, a pivoted latch having its rear end shaped to engage the latch member on the corresponding rcciprocable bar and its forward end adjacent to said special pin, index-pin-setting linkages. a special pin-depressing bar normally held out of operation, and subtractionsetting means for actuating said special pin- `means for moving `depressed position. and

Y means. comprising a bell crank depressing bar to depress all of said special pins and place bar under the control of a device universal to said index-pin-setting linkages, for moving to inoperative position the pivoted latch on a frame simultaneously with the setting of an index pin in that frame.

31. In a computing machine` the combina.- tion with a numeral key. of a series of numeral-key-actuated linkages. an additional linkage comprising bell cranks, a connection to cause said bell cranks to `move in unison, a link supported on arms of 'said bell cranks for movement to and from the outer ends of said alms. a. bail universal to said numeral-key-actuatcd linkages connected to one of said bell cranks. and said link toward the inner ends of the supporting arms of said bell cranks and concomitantly withdrawing said bail from position to 2o-operate i'vith said nllmeral-key-actuated linkages.

32. 'hc combination with computing mechanism settable for addition or subtraction. of controlling means therefor including a pivoted lever having an upwardly curvcdrear arm provided with a pin, a subtraction Setting shaft.an arm fixed thereon and provided with pin to hold the rea-r arm of said lever in a spring secured at one. end to said arm and at the other end to the forward arm of said lever.

33. The combination with computing means for performing either addition 0r subtract-ion. of a pivoted lever co-operat-ing at its forward end with said computing means for setting the same. and having an upwardly curved rear arm. spring means tending to depress the forward arm of said lever. latehing means normally restraining said lever from movement to produce depression ol its forward arm. means to restore said lever to the control of the latching having a pin engaging the upwardly curved rear arm of said lever. a general operator. and general operator aeluated means for actuating said bell crank and thereby placing said pivoted lever under means.

34. In a computing machine. the combination vwith 'a register. of actuating means therefor including a rcciprocahle liar. a frame sliilalily mounted thereon. a series of scttalilc index pins.' a settable subtraction pin ,'.iounted in said frame. a latch member pivoted ou sad franle. said latch member being formed at its rear end to have latch: ing engagement. with said 'har and at its foruard endto overlie a shoulder on -said subtraction pin, a series of pin-setting bars normally out of alignment with said index pins. an actuating bar normall)Y in alignment with said subtraction pin, and means to the. control of said latching a notch to engage Vsaid,

said special pin-depressing 'including means to set up bring said index pins into alignment with said index-pin-setting bars and the forward end of said late `member into alignment with said actuating bar.

35. vIn a Vcomputing m'achine, tion with a register, of means registration therein comprising a 'set of in-V dex devices, means to index numbers thereon, operating mechanism for running up additivelyA in -said register the number indexed, means for causin said o rating mechanism to run up additively in e regis ter the complement of the number indexed,

a connectionbetween certain of said index devices and said operating mechanism to enable said operating mechanism to give each of these index devices a movement in accordance with the highest digit which can be indexed thereon, and means elective upon indexing digits in the various index devices to change the con nection between said index devices and the operating mechanism'to cause each of said index devices to have an idle movement corresponding to the setting of saiddevice followed by an active movement corres ndng to the complementary setting o said device.

86. The combination with a system of computi wheels and actuating means therefor, including bars individua to said computing wheels and .of which is normally connected to the respective barto move therewith, of a subtraction mechanism including means to advance one of said movable devices ten steps and the others nine steps at each substraation operation, and 'means to cause idle movement of any desired number of steps between any movable device and the correspending bar.

37. The combination wth-a system of computing wheels and actuatin means therefor, including bars individua to said computing wheels, movable devices for sev erally actuating said bars and connections between the bars and the corresponding' movable devices normally acting to effect a movement of the bar equal to that of the movable device, of subtraction mechanism including means to advance one of said movable devices ten steps and each of the others nine steps, and means to cause an idle movement of an)r desired number of steps. between certain of said movable devices and the corresponding bars.

88. In a'computing machine, the combina tion with a register, of actuating means therefor comprising a reciprocable bar havin a bitching element thereon, a frame s lidably mounted on said bar, a series of Bettable index pins` a settable subtraction pin, and a pivoted latch carried by said rame, one end of said latch being shaped lo engage said hatching clement on Said bar,

the combinaor effecting movable devices, each and the other beings,r ositioned to overlie. a shoulder on said su traction pin, and a` stop on said bar positioned to be engaged by a depressed index pin after an idle inove nient of the frame corresponding to the pin depressed'. 4

39. In a computing machine, the combi nation with a register, of aciuuting means therefor comprising a: frame carrying' a series of index pins at regular steps apart, a settable subtraction pin spaced to the rear of said index` pins, and a pivoted latch having its forward end overljfingI a shoulder on said subtraction pin and having a hook atiits rear end, a reciprocable har on which said frame is slidably mounted, a device with which said hook co-operates for holdin said frame latchcd in rear position on said bar, and a stop on said bar one step in advance of the first index pin when the frame is in latched position. l

40. Inia computing machine, the combination with-a register, of actuating means therefor comprising a frame carrying a' series of index pins at regular steps apart, a settable subtraction pin spaced to the rear 0f said index pins, and a latch having its forward end overlying a shoulder on said subtraction pin and having a hook at its rear end, a reciprocable bar on which said frame is slidably mounted, a device with which said hook cooperates for holding said frame latehed in rear position on `said bai, a sto on said bar one step in advance of the rst index pin when the frame is in latched position, and a bar supported on said.frame for limited elevation and depression, said bar having a shoulder one ste to the rear of said subtraction pin.

rl. In a computing machine, the combination with a register, of actuating means therefor including a slidably mounted frame carying a. series of index plus at regular intervals apart, land a settable special pin spaced to the rear of said index pins, and a general operator including u bar having al longitudinal slot, the distance between the forward edge of said bar and the rearward edge of lthe slot being equal to the distance between the s ecial pin and the index pin of highest va ne.

42. In a computing machine, the combination with a computing device, of actuating means therefor including a slidahly mounted frame carrying a series of settable index pins at regular steps apart, a settable special piu spaced to the rear of said index pins. and a pvoied locking member havin its forward end associated `with said spccia pin to be lifted thereby from a depressed position and havinf r a latch at its rear end, a member with which said latch co-operates when in depressed position` a general operator bar having a longitudinal slot supplying a pin'engaging edge at a distance to the rear of the forward edge of said bar, equal to the distance between the special pin and the reurmost index pin, and a bar mounted for movement through said slot to restore the depressed special pin and the inoperativelyv positioned locking member to normal position.

43. In a conu'iuting machine, the combination with a iegister, of actuating means therefor comprising a general operator and preliminary representation devices includini;l numeral keys, numeial-key-actuaied linkages, :in independent linkage comprising a lower bar carrviiur pins at its ends. hell cranks `with vertu-a and horizontal'arms. said horizontal arine-l having slots to receive said pins, and a hail connected to one of said hell cranksl universal with respect to said inimeralhey-actuatedl linkages. means to move lsaid pins to the inner ends of said slots and withdraw said bail from operative position. including .a lever pivoted on a transverse axis and having its forward end brought into parallelism with said axis. a hitch member pivoted on the forward end of said lever and urged into position lo engage the adjacent one of said pins'. Said latch member having an inclined upper edge to engage said pin and therel'r)7 move the pins to the inner ends of said slots, and a downwardly facing shoulder to engage said pin and move the saine downwardl)y in restoring said lower liar and said hail to operative positions.

44. In a computing machine settahle for addition or subtraction, the combination with a series of reeiprocable bars, of actuating means therefor.l comprising a general operator, a frame slidablc on each of said bars, a set vof index pins and a suhtraction pin settably mounted in each of said frames. means including a latch meinber piroted on each of said frames for noi:- inally preventing relatiie movement hetween thc frame and the corresponding har,

means' for setting the same index pins either for addition or subtraction. and means effective upon setting for subtraction to depress all of and thereafter to move to ineffective position the latch member on an v bar simultaneously with the setting of an index pin thereon.

45. In a computing machine, the conihination with a plurality of' registers. of mechanism for selectively performing either addition or complementar subtract ion comprising an actuating device for each of said registers including a set of index devices. means universal to all setsof index devices for indexing thereon the number to be coniputed, means individual to each of said artuating devices to setthe saine for addition after the number has been indexed with the .nachine set for subtraction, and :i general the subtract ion pins spegial pin Vanis-m including numeral ke thereby effect in said registers addition or coinplenientaiw' subtraction of the number indexed.

46. In a computing machine, the combina- -tion with a computing device, of a slidably mounted franiecarnying a series of settable index pins, a settable special pin, and a pivoted locking member having its forward end associated with said special pin to be lifted thereby from the depressed position and having :i' latch at its rear end, a slidahly mounted bar adjacent said frame, a member on said liar with which Said latch co-operates when in a del'ircssed position, a general operator bar for engaging index pins which have been set, and a second gen eral operator bar for engaging the Special pin when set, the forward edges of the respective general operator bars being spaced eoperator to drive said index devices and 'iol apart a distance equal to that between the t and the nearest index pin.

` 4i. 1n a computing machine, the combina tion with a register, of rcciprocable driving liars therefor, on, means to lock said frainesagainst movement on their respective bars, including pivoted latch members on said frames provided with hooks at their rear ends, and eooperating members on table index pins and a settable subtraction pin' mounted on each frame, each subtraction pin having a shoulder underlying the forward end of the correspondingr pivotcd latch member, numeral keys, tuated linkages positioned in adance of the corresponding index devices, an additional linkage positioned over said special pins= a device universal to said nunieralfkegmcA frames slidably mounted there the driving bars, setnuineral-key-actuated linkages for actuatingr said additional 10.5

linkage, and means to render said additional linkage inctl'ective and lo withdraw said universal device from etl'ective position with respect to-said kevv'actuated linkages. l

4ta'. The combination with typewriter mechof comput in; r means comprising reciprocnble bars, frames slidably mounted thereon. groups of sctiabhindex pins on said frames, nunu-ral-kei actuated means for printing a digit and ron- 1X5 comitantly setting up the same index pin for either addition or subtraction, means to ell'ect addition including nit-ans tollock the respective bars and yframes; against relative movement, and to etree! a morena-nt thereof proportional to the pins depressed. and means to clfe;t subtraction. comprising means to move all of said frames a lixed distance and to cause a relative displacement between each liar frame in `proportion to the value of the pin set in that frame.

49. In a computing machine, the combination with a plurality of registers, of actuating,r devices therefor includingrr a set of and the corresponding tuating bars for each of said re isters and settable pins thereon, a genera operator,

' means individual to each register to restore to normal position ins which have been set, a manually opera le pin-restoring device universal to said registers, and means to prevent actuation of said universal pin-restoring device during the operation of the general operator'.

50. ln a computing machine having a plurality of registers, the combination with a set of number-wheels for cach register, of means for. concomitantly actuating all of said sets of number-wheels whereby either addition or complementary subtraction may be etlcctcd in any set irrespective of the foi-ins of computation ctected in the other sets, said actuating means comprising a plurality of pin carriers, one for each numberwheel, a single set of pins on cach of said cai'- ricrs settable to index the digits of numbers to be computed, a general operator tuo actuate the pin-carriers to effect computation con- `coinitantly in all of the registers, and means for indexing a number on the pin-carriers for all of said sets of number-wheels con comitaiitly and determining the form of computation to be effected when the pincarriers are actuated b the general operator, said indexing an determining means comprising for each digit a single pin-setting bar extending across all of the pincarriers for setting concomitantly the corresponding pins on the corresponding pincarriers for each set of number-wheels irrespective of the forms=of computation to be effected in the different registers.

51. In a computing machine having a plurality of registers, the combination with a set of number-wheels for each register of means for concomitanti `actuating all of said sets of number-whee s' whereby either addition or complementary subtraction may be effected in any set irrespective of the forms of computation effected in the other sets, said actuating means normally set for addition and comprising a plurality of pin carriers, one for each number-wheel, j a single set of ins on each of said carriers settable to in efr the digits of numbers to be computed', a general operator to actuate the pin-carriers to effect computation concomitantly in all of the registers, means for indexing a number on the pin-carriers for all of said sets of number-wheels concomtantly and determining the form of computation to be etl'ected when the pincarriers are actuated by the general operator, said indexing and determining means comprising for each digit a single inset ting bar `extending across all of t e pincarriers for setting concomitantly the corresponding pins on the corresponding pincarriers for each set of number-wheels irrespective of the forms of computation to be effected in the different registeis, means for setting said actuating means for sub traction, and means including devices individu'al to said registers whereby said actuating means after being set for subtraction may be caused to-eifect addition in selected registers.

52. In a computing machine having a plurality of registers, the combination with a set of number-wheels for each register, of means for concomitantly actuating all of said sets of number-wheels whereby either addition or complementary subtraction may be effected in any set irrespective of the' forms of computation effected in the other sets, said actuating means being normallyset for addition and comprising a pluralit of pin-carriers, one for each number-whee a single set ,of pins on each of said carriers settable to index the digits of numbers to be computed, a general operator to actuate the pin-carriers to effect computation conconiitantly in all of the registers, means for indexing a n'umber on the pin-carriers forvall of said sets of number-wheels concomitantly and f erinining the form of compntation to be eftected when the pin-carriers are actuated by the general operator, said indexing and determining means com rising for cach digit a single pin-setting ar extending across all of the piuma-luiers for settiiig concoiiiitantly the corresponding pins on the corresponding pinfcarriers for each set `of.: number-wheels irrespective of the Vforms of computation to be effected in the different registers, and means including devices individual to said registers for causing subtraction to be effected in some registers and addition in others.

53. In a computing machine having a plurality of registers, the combination with a set of number-wheels for each register, ot' means for conconiitantly actuating all of said sets of number-wheels whereby either addition or complementary subtraction may bc effected in any set irrespective ofthe forms of computation effected in the other sets, said actuating means being normally set 4for effecting computation in tone form and comprising a plurality of pinlcairiers, one for each number-wheel, a singleset of pins on each of said carriers settable to index the digits of numbers to be coinputed, a general operator to actuate Lire pm carriers to effect computation coilc'omi tantly in all of the rogistei-spmeansjor indieting a number on the pin-carriers for all .of said sets of nuinber-wheels concomitantlyand determining the form :if computation to be effected when the pin-carriers are actuated by the general operator, said indexing and determinin means compris i'n'g for eachdigit a singr e pin-setting bar extending across al1 of the pin-carriers .for setting concomitantly the corresponding pins on'the correspondin pin-carriers for each setI of number-whees irrespective of the forms of computation to be etected in the different registers'and means individual to said registers. whereby com utation of the form, other than that norma ly eil'ected, may be effected.

54. In a computing machine, in combination, a register comprising number-wheels, and actuating means for said number-wheels having one-way connections therewith to effect addition or complementary subtraction, said actuating means comprising pin-car` riers, one for each wheel and having a single set of settable index pins thereon, a general operator -for actuating said 'in-carriers to turn said wheels, and means or setting said index pins and determining which form of computation is to be etected, whereby, for a given number, exactly the saine index pins will be s et for both addition and subtraction.

55. In a computing machine, in combination, a plurality of registers, each comprising a plurality of nnnihei-wheels` and actuating means for said number-wheelsv having one-way connections therewith to etl'ect addition or complementary subtraction, the form of computation to be effected in any one of said registers being entirely independent of that etlected in any other register, said actuating means comprising pin-carriers, one for each wheel and having a single set of settable index pins thereon, a general operator for actuating said pin-carriers to turn said wheels, and means for setting said index pins and determining which form of computation is to beetfected in each of the registers, whereby for a given number the corresponding index pins in the pin carriers for the different. sets will be set irrespective of the forms ot' computation to be effected in the various registers.

56. In a computing machine. in combinaltion, number-keys, one for each digit, a

plurality of registeis, each comprising a plurality of number-wheels, and actuating means for said niunberwheels having oneway connections therewith to effect addition 'or complementary subtraction, the form of i computation to be ctlected in any one of said registers being entirely independent of that effected in any other register, said actuating means com rising pin-carriers, one foi-'each wheel and aving a single set of settable index pins thereon, a general operator for actuating said pinrarriers to turn said wheels, and means for setting said index pins and determnin which form of computation is to be e ected in each of the registers, said setting and determining means comprising a transvee bar for each number-key extending across :all of said pincarriers, whereby for a iven number the corresponding index pins 1n the pin-carriers for the di'erent sets will be set irrespective of the forms of computation to be effected 'in the various registers.

57. In a computing machine, the combination with a set of computin wheels, of actuating devices, one for eac computing wheel *and having a one-Way connection therewith, a general operator, 'and generaloperator-actuated interponent devices settable for driving said actuating devices to effect additionor complementary subtracl tion, each of said interponent devices having a single set of index pins settable to index the corresponding digit of a number to be computed, the saine index pins being set for the same number irrespective of the form of computation to be effected.

58. In a computing machine, the'combination with a set of computing wheels, of computation bars, one for each computing wheel and having a one-way connection therewith, a general operator, and general-o ratoractuated interpellent. devices setta le for driving said bars to'eti'ect addition or com plementary subtraction, each of said interponent devices having a single set of index pins settable to index the corres nding of a number to be computed, t e same in ex pins being set for the same number irrespective of the form of computation to be effected, each of said inter nent devices also having a s ecial pin whic when set for subtraction, wi l be engaged by the general operator and a uniform movement of all of said interponent devices etected.

59. In a computing machine, the combina-' tion with a set of computing wheels, of computation bars, one for each computing wheel and having a one-way connection therewith, a general operator, general-o erator-actnated interponent devices settahe for driving said bars to effect, additionorcomplementary subtraction, each of said interponent devices having a single set of index pins settable to index the corresponding digit of a number to be computed, the saine/'index pins being sct for the same number irrespective of the form of computation bo be ellected, each of said interponent devices also having a special pin which` when set for subtraction, will be engaged by the enerel operator and a uniform movement o all of said interponent devices effected, and a latch for nor-` mally holding each interponent device against movement relative to its coniputation bar, said latch being released when a digit is indexed for subtraction on the same interponent device.

60. In a computing machi'ie, the combination with a set of computing wheels, of computation bars, one for nach computing wheel and having a one-way connection therewith, a general operator, general-oper (ttor-actuated interponent devices scitable for driving said bars to effect addition or complementary subtraction, each of said in- 

